Chalcogenide IR-Fibers

Core / Clad Chalcogenide Infra-Red (CIR-) fibers are transparent iver a wide spectral range from 1 to 6 μm, therefore covering a spectral gap between silica and polycrystalline fibers. CIR fibers are used in a variety of applications, including spectroscopy and process monitoring tasks, IR radiation delivery to and out of closed volumes, thermosensing, laser power flexible delivery systems, IR-imaging, etc.

The fibers are provided in standart cable assemblies with 3 connector options, 3 sheathing options, and a line of customized fiber assemblies designed according customer’s request. We provide custom fiber solutions for non-standart tasks. Single-mode and small core fibers are available, along with a special glass compositions for a broader spectral range.

Key Features

● Fiber type – Step Index Multimode

● Standard fiber diameters from 0.3 to 0.55 mm

● Standard fiber transmittance in 1.1 – 6.5 µm spectral range

● Typical optical losses 0.2 dB/m at 3 – 4 µm

● Double polymer coating for high flexibility

Applications

● Spectroscopy Fiber Probes for Mid-IR spectra

● Remote non-contact pyrometry in the 200-600K range

● Flexible Radiometry

● Flexible IR-imaging Systems

● Power delivery for QC – Lasers

Specifications

Common Parameters

Material Composition	As2S3
Spectral Range	1.1 – 6.5 μm
Core Refractive Index	2.4
Fresnel Reflection Losses	31%
Attenuation at at 3 – 4 µm	0.2-0.4 dB/m
Effective Numerical Aperture NA	0.30+/-0.05
Melting Point	near 400°C
Operating Temperature	-200 to +90°C
Core/Clad Diameter (standard)	see table below
Protective Jacket	Fluoro polymer + PVC
Tensile Strength	> 700 MPa
Minimum Bending Radius (fixed)	100[Fiber Diameter]
Minimum Elastic Bending Radius	200[Fiber Diameter]

Chalcogenide Fiber Specification

Code	CIR 250/300	CIR 340/400	CIR 500/550	CIR 8/300	CIR 50/250
Type	Step Index Multimode	Step Index Multimode	Step Index Multimode	Step Index Singlemode	Step Index few modes
Core Diameter, µm	250±10	340±10	500±15	8±1	50±3
Cladding Diameter, µm	300±15	400±15	550±20	300±15	250±10
Polyvinylchloride Protective Jacket Diameter, µm	400±20	500±20	670±20	400±20	350±20
NA	0.25±0.05	0.25±0.05	0.25±0.05	0.25±0.05	0.13±0.02
Minimum Bending Radius (fixed), mm	30	40	50	30	25
Minimum Elastic Bending Radius, mm	60	80	100	60	50

⃰ other diameters are available on request